Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a5c14d4ad7d317…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 06:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b168e3dc3fb42eec09680ac1db1b5b32 SHA-1: 2552f465a246ab54c2aece88660ecfd3c5880899 SHA-256: 97a5c14d4ad7d317e78c7a5d456297f97dc5a602d458c1cf5db24272dfd485d1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=android+ndk+get+data+directory In PDF document text
    • http://vuwiso.victoriasmithmusic.com/uploads/1/3/1/4/131438282/sidoxilafogufokufo.pdfIn PDF document text
    • http://files.dorsethps.org.uk/uploads/1/3/2/6/132695280/nakotivamow-novavan-wibexubitoteli-dusadusik.pdfIn PDF document text
    • http://files.brennahelm.com/uploads/1/3/0/7/130776276/duzomaxodikedawegedo.pdfIn PDF document text
    • http://files.thefivepercent.net/uploads/1/3/1/3/131383456/gimugiwutakim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/application_of_nanotechnology_in_food_packaging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/xuzopupimegevazipediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/gefewetowejowidub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/18377809780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/gta_san_andreas_cheats_download_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/92882624453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/27753847693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/juwuzimefegigelupuzoduje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/fepigenikozamudanejad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/migokurejalaliverowadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/xipogasajigu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 4840 bytes
SHA-256: 02ff00546249b3764b81cca029381443a66487606b23ce8c14486cb2bae52076
font_01_sfnt_off000074d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 13948 bytes
SHA-256: edbde49ec755ef7335f76ba02035ff626c5c75ddd2995a5f7eba74fcb059ddb8
font_02_sfnt_off0000a13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA13C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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